react-native弹窗封装的方法

export const showModal = (component) => {
    sibling = new RootSiblings(component);
};

export const destroySibling = (component) =>  sibling && sibling.destroy()

export const update = (index, component) => sibling && sibling.update(<View>{component}</View>)

//ShowModal.js
import React from 'react';
import {View} from 'react-native';
import RootSiblings from 'react-native-root-siblings';  //全局弹框组件
let sibling = null;
export const showModal = (component) => {
    sibling = new RootSiblings(component);
};
export const destroySibling = (component) =>  sibling && sibling.destroy()
export const update = (index, component) => sibling && sibling.update(<View>{component}</View>)

import React from 'react';
import {Animated, InteractionManager, Easing, TouchableOpacity} from 'react-native';
import {getScreenHeight, getScreenWidth} from '../../utils/util';
import {destroyLastSibling} from '../showModal/ShowModal';
export default class ModalBg extends React.Component {
  animated = new Animated.Value(0);

  isShow = false;

  componentDidMount(): void {
    InteractionManager.runAfterInteractions(() => {
      this.handleAni();
    });
  }

  componentWillUnmount(): void {
    InteractionManager.runAfterInteractions(() => {
      this.handleAni();
    });
  }

  handleAni = () => {
    Animated.timing(this.animated, {
      toValue: this.isShow ? 0 : 1,
      duration: 250,
      easing: Easing.ease
    }).start(() => this.isShow = !this.isShow);
  };

  render() {
    const opct = this.animated.interpolate({
      inputRange: [0, 1],
      outputRange: [0, 0.4]
    });
    return <Animated.View style={{
      position: 'absolute',
      width: getScreenWidth(),
      height: getScreenHeight(),
      backgroundColor: '#000',
      opacity: opct,
      zIndex: 10
    }}><TouchableOpacity onPress={() => {
      destroyLastSibling();
    }} style={{flex: 1}} /></Animated.View>;
  }
}

showModal(<ModalBg />);